big bang cross word

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Across
  1. 2. how heave some thing is
  2. 4. The second one on the periodic table
  3. 5. what people think made the plants
  4. 8. the measr of light
  5. 9. what still happens now
Down
  1. 1. how many year after the big bang
  2. 3. started to happen after the big bang
  3. 4. Its the first one in the periodic table
  4. 6. proves that other plant are moving way
  5. 7. changing the pitch of sire